Senior Software Engineer | Site Controller Development

Permanent employee, Full-time · Diemen

Your mission

Design and implement software for Moonwatt’s power plant controller, enabling communication with solar inverters, battery management systems (BMS), and industrial hardware.
Develop and optimize real-time control algorithms to manage power flow, battery charge/discharge, and grid-facing services such as frequency regulation and voltage support.
Ensure high-reliability telemetry collection and monitoring through integration with SCADA systems and industrial protocols like Modbus, IEC 61850, and CAN.
Collaborate with hardware teams, cloud software engineers, and UI/UX developers to define clear data structures, APIs, and interface logic.
Implement secure, standards-compliant communication and authentication protocols in line with cybersecurity regulations (IEC 62351, ENISA, etc.).
Write clean, modular, and testable code, with automated testing to ensure system robustness and performance.
Support system commissioning, troubleshooting, and real-world deployment challenges.
Contribute to technical documentation and development best practices.

Your profile

Must-Have Qualifications

Bachelor’s degree in Computer Science, Electrical Engineering, or a related field (or equivalent professional experience).
5+ years of experience in software development for real-time control, industrial automation, or energy systems.
Proficiency in C/C++, Go, and Python for embedded or real-time system applications.
In-depth knowledge of industrial communication protocols, especially IEC 61850, Modbus (TCP/RTU), and OPC UA.
Experience integrating with SCADA systems and HMI platforms for industrial energy control.
Familiarity with embedded systems, RTOS, or PLC development (IEC 61131-3).
Understanding of control theory and energy management algorithms for solar and storage.
Knowledge of European grid codes and IEC standards (IEC 61400-25, IEC 61724, IEC 62351).
Strong debugging and problem-solving skills for complex system-level interactions.
Experience with version control (Git) and producing clear, maintainable technical documentation.

Preferred Qualifications

Hands-on experience with RTOS or time-critical control systems.
Understanding of European cybersecurity frameworks for energy infrastructure.
Familiarity with power electronics, AC/DC systems, and energy infrastructure design.
Previous experience working on solar PV or battery energy storage systems (BESS) in the European market.

Why us?

Be part of a fast-growing startup delivering next-generation clean energy technology.
Work on high-impact projects alongside experienced engineers across the EU.
Competitive salary, benefits, and opportunities for growth in the energy tech sector.

WE PARTICULARLY ENCOURAGE WOMEN AND INDIVIDUALS FROM UNDERREPRESENTED BACKGROUNDS TO APPLY EVEN IF YOU DON'T MEET 100% OF THE LISTED QUALIFICATIONS. POTENTIAL AND MOTIVATION MATTERS AS MUCH AS EXPERIENCE.

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About us

Moonwatt is developing the next generation of highly competitive Energy Storage Systems utilizing advanced sodium-ion battery technology. Our hardware and software solutions are optimized for co-location with solar power plants, enabling them to completely replace fossil-fuel power generation on the world’s power grids. We are seeking talented individuals across all areas whether you are in engineering, marketing, design, project management, HR, or finance. Join our team push the boundaries of innovation. If you are driven by the desire to create change, tackle big challenges, and make a meaningful impact, we’d love to have you onboard!

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We are looking forward to hearing from you!

Thank you for your interest in Demo Data Ltd. Please fill out the following short form. Should you have difficulties with the upload of your data, please send an email to demodaten@demo.de.